Thoughts on this tool?
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Joined: Jul 2010
Posts: 109
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From: MI
Car: 85 Trans AM
Engine: Chevy 355
Transmission: T-5
Axle/Gears: 3.73
Thoughts on this tool?
Last edited by jprix; Aug 25, 2010 at 08:34 PM.
Joined: Apr 2005
Posts: 7,736
Likes: 14
From: Not in Kansas anymore
Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: Thoughts on this tool?
Required to change cam bearings.
Not something your average home mechanic would need or keep in this tool box unless you are doing full rebuilds on a regular basis .
Normally only change cam bearings on VERY high mileage engines or when block gets hot tanked
Not something your average home mechanic would need or keep in this tool box unless you are doing full rebuilds on a regular basis .
Normally only change cam bearings on VERY high mileage engines or when block gets hot tanked
Thread Starter
Member
Joined: Jul 2010
Posts: 109
Likes: 0
From: MI
Car: 85 Trans AM
Engine: Chevy 355
Transmission: T-5
Axle/Gears: 3.73
Re: Thoughts on this tool?
I was under the impression that cam bearing tools cost $60 on up,and seeing one at 30$ was a shock.
But, since we are on the subject of when to change bearings,my motor looses oil pressure when warm,I'm going to do a main and rod bearing overhaul and thought changing the cam bearing would be a good idea also.
But after reading your post and reading that cam bearings rarely go bad im having second thoughts. If i could get away by not messing with them, it would be great.I do not plan on getting the block hot tanked. Thoughts?
Last edited by jprix; Aug 25, 2010 at 08:49 PM.
Joined: Apr 2005
Posts: 7,736
Likes: 14
From: Not in Kansas anymore
Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: Thoughts on this tool?
As you are aware , most pressure drop off is from excessive clearance in bottom end
Thread Starter
Member
Joined: Jul 2010
Posts: 109
Likes: 0
From: MI
Car: 85 Trans AM
Engine: Chevy 355
Transmission: T-5
Axle/Gears: 3.73
Re: Thoughts on this tool?
I was thinking that since the engine had low/no oil pressure bad enough to damage the bottom end,the cam bearings had to suffer some.
Joined: Apr 2005
Posts: 7,736
Likes: 14
From: Not in Kansas anymore
Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: Thoughts on this tool?
Did it have low oil pressure say from a bad pump that damaged the bottom end due to low oil pressure
or is it as most commonly found ;
the bearings and crank journals are so well worn ,that the oil pressure bleeds off when oil thins out as it heats up.
Can only be fixed by grinding crank and fitting under size bearings to bring clearance back to spec
Cam bearing are not under the same type loads as crank bearing so seldom wear
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